Hoisting apparatus



(No Model.)

F. M. DAVI'S.

HOISTING APPARATUS.

Patented Dec. 11', 1888.

u Pmznk Pholu-Lilhogmphar. Washington. a a

UNITED STATES PATENT OFFICE.

FRANCIS M. DAVIS, OF DENVER, COLORADO.

HOISTING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 394,344, dated December 11, 1888.

Application filed May 12, 1888.

To all whom, it may concern/.-

l-ie it known that I, I RANCIS H. DAVIS, of Denver, in the county of Arapahoe and State of Colorado, have invented a new and useful Improvement in. llm'sc-lower lloisting Appa' ratus; and I do hereby declare that the following is a full, clear, and exact description of the same.

It is the object of my invention to provide a hoisting apparatus for use as a horse-power hoist in situations where other kindsof power are not required, or are too expensive for the use to which the hoist is applied.

The invention is designml to provide a simple form of apparatus, consisting of few parts, but effective both in raising and lmvering loads.

The invention consists in the devices and combination and arrangement of said devices, as hereinafter particularly pointed out.

In the drawings, Figure] is a side elevation of my improved apparatus, partly in section. Fig. 2 is a plan view of the same. Fig. 3 is an end view showing the brake-shoes in place.

The frame of the apparatus is shown at B, and consists of a suitable base-plate and end stai'ldards, C l), for supporting the workii'lg parts. The winding-drum is shown at A, and is fixed to and supported by a shaft, O, which is mounted in a sleeve, (1 supported by the standard ,1) at the other end. The drum is mounted upon this shaft, and receives rotary motion in the following manner: Upon the shaft 0 is mounted loosely a friction-disk, P, which rotates on said shaft. It is located on the shaft in proximit to the end of the drum, and in its face nearest the drum, near the outer periphery, is provided a V shaped groove, which is ada-lned to receive a similar V-shaped projection, 11*, on the face of the drum. \Vhen the drum is forced forward by means hercinaftt-n' referred to, the projection enters the groove in the disk, and when the disk revolved the drum moves with it, held thereto by frictional contact.

The friction-disk is driven as follows: Secured about or formed with the hub of the disk is a beveled gear, E, which is adapted to engage with the beveled teeth of a large crownwheel, E, mounted upon a vertical shaft having its hearings in the standard and base-plate $erial No. 273,705. (No model.)

I This shaft has secured to it a casting, Ii, forming a socket for the sweep, to which the horses are attached in the operation of the apparatus. The disk and bevel-gear are held in proper position on the shaft bvmeansof a yoke, n, which is bolted to the under part of the bearing (1, and lll'OjOOl'S outwardly, terminating in a bifurcated arm which engages a groove in the hub of the disk.

At the opposite end of the machine the shaft rests in a sleeve, (l, heretofore referred to, which in turn rests in the half-bearing formed in the top of the standard I). The shaft simply bears in the sleeve, and is not secured thereto. This sleeve (l has an inner hub, G, with a handle, G extending therefrom between the standard I) and the drum, and from this hub to the end of the sleeve is formed a screw-tlu'ead, as shown at 1).

Above the sleeve, and forming the other half of the bearing, is placed a cap, J, securely bolted to the standard. This cap has a threaded interior correspondin g to and fitting the threads of the sleeve. The sleeve G is held in a definite position upon the shaft by the hub of the drum on one side, and by a collar, II, fastened to the shaft on the other, with only play enough to allow the shaft to revolve freely. It will then be seen that as the drum is fastened tightly upon the shaft and the sleeve G is held in a definite position upon the shaft, and as the sleeve is capable of longitudinal movement through its screwthreaded connection with the cap .1, by turning the handle of the sleeve G in one direction or the other, according to the direction of its threaded shank, the shaft, and therefore the drum, will be shifted laterally into engagement with the moving frictiondisk P. This enables the drum to hoist. To lower freely, the lever of the sleeve is moved in the opposite direction, and the weight attached to the lmisting-drum will be sufficient to cause the rope to unwind.

In order to retard the revolution of the drum in the descent of the load, I provide the fol lowing means: The standard D is made with projecting arms 0 c, which may be cast with or bolted to the said standard. The ends of the arms are in line with the sides of the standards C at the opposite end of the machine, and tie-rods m connect the two standards and brace the machine. On each of the arms 0, within the diameter of the drum, is cast or secured a socket, (l, and within these sockets I place friction material, such as wooden disks (1. By reversing the action of the lever G the drum may be moved back until it bears against the wooden friction-disks, and in this manner the revolution of the drum is retarded to a greater or less degree. As the wooden friction-disks wear, the standard may be advanced, the sleeve G and upper bearings, J, holdin the same relative positions by means of the elongated slots in the cap.

Ilavin g thus described my invention, what I claim is 1. A hoisting apparatus consisting of a supporting-shaft supported in bearings and fitted to have longitudinal sliding movement in said bearings, a drum mounted rigidly thereon, a disk mounted loosely thereon, the said shaft extending through and beyond said disk, a vertical driving-shaft, a beveled gear on the same, a beveled pinion in connection with the loosely-mounted friction-disk, an arm, as n, for holding the friction-disk and pinion against longitudinal sliding movement on the sliding shaft, and an operating-lever in connection with the sliding shaft for moving it, substantially as described. 7

2. A hoisting apparatus consisting of a supporting sliding shaft, a drum fastened to said shaft, and a friction-disk mounted loosely thereon, connections between said frictiondisk and a source of power for driving the s'ame,'a sleeve, G, externally screw-threaded and forming a bearin g for the shaft, a standard, D, formed with a plain bearing atits upper end for the sleeve, the brake-shoes on the standard D, a cap secured to the standard forming an upper bearing for the sleeve, correspondingly screw-threaded, a collar for fixin g the position of the sleeve, and a handle For operating said sleeve, substantially as described.

3. In. combination, the longitudinally-movable druin, the friction-disk, the shaft, and the standard D, having laterally-extendin g arms, said arms (3 having sockets (Z and disks (1, adapted thereto, substantially as described.

4. A hoisting apparatus consisting of a suit-' able base, standards at each end thereof, tie rods between the standards, a supportingshaft; a drum fastened to and fi.-iction-disk loosely mounted on said shaft, a beveled gear connected to the hub of the friction-disk, a crown-wheel gearing with said beveled gear, a vertical shaft connected with the sweep-arm of ahorse-power for rotating the vertical shaft, a sleeve, G, having a screw-tlnreaded periphery, having a bearing in standard D and engagin with a screw-threaded cap, a handle for operating it, and friction -plates supported from arms of the standard D, all substantially as described.

In. testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

FRANCIS M. DAVIS.

Vitnesses:

LYNN H. MARsH, ORLANDO C. MARSH. 

